This movie was quite funny and lighthearted. It was set during the drama so it carried the unbothered, relaxed tone of the first half of the series. Also, I haven't seen Kyuranger so... no idea what was happening with that part of the movie ¯\_(ツ)_/¯

Some of the most hilarious moments?

When Kairi, Touma and Umika were kidnapped by those funny aliens and Kairi's reaction was, "Oh, look, they're kidnapping us."
During one of the fights, when Keiichiro went all head first again and Kairi saved his life, complaining, "Well, that was even more reckless than usually, officer!"
When Kairi, Touma and Umika had to use the Patrenger VSs and transformed into cops! The way the Patrenger suits just didn't sit right with them, being build for fighting instead of agility.
When the Kyuranger green girl told Umika that there were 12 of them altogether! And Umika was all, "Seriously?!" while Kairi's reaction was, "A whole crayon set!" I seriously guffawed.

I had really fun watching this. It made me smile.